hive - Why migrate from teradata to hadoop -

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help me understand advantages of hadoop on teradata. why should migrate teradat hadoop. in applications have reports retrieving data teradata, reports slow because of millions of row data.

will migrating hadoop resolve it?

possible duplicate of hadoop vs teradata difference.

the main advantage of hadoop system scalability commodity hardware.

as pointed out @dnoeth in comments. teradata scales out similar hadoop. can scale out using expensive servers. hadoop systems can scale out using commodity hardware (more commonly available less expensive hardware).

in pioneer days used oxen heavy pulling, , when 1 ox couldn’t budge log, didn’t try grow larger ox. shouldn’t trying bigger computers, more systems of computers.
—grace hopper

hadoop advantages

  1. fault tolerance provided part of system. graceful degradation, , data availability taken care of.
  2. individual nodes in cluster can vary in capacities.
  3. flexibility add/remove nodes cluster without shutting cluster down.

hadoop disadvantages

  1. it batch processing system high throughput , high latency.
  2. hadoop distributed file system doesn't allow modifying existing files.
  3. performance poor if used small data.

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